diff --git a/lib/Makefile.am b/lib/Makefile.am
index 3558dd8..a7ae651 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -44,6 +44,10 @@
 SUBDIRS += perl
 endif
 
+if WITH_PHP
+SUBDIRS += php
+endif
+
 # All of the libs that don't use Automake need to go in here
 # so they will end up in our release tarballs.
 EXTRA_DIST = \